On Plants vs. Zombies Wiki, there was someone called BobbyRio2,
a sockpuppet account controlled by the same person who controls
SavannahRio2 (links to their userpages are below), and Nathania44
and Nathania1221 are thought to be other alternate accounts.

http://plantsvszombies.wikia.com/wiki/User%3ABobbyRio2

http://plantsvszombies.wikia.com/wiki/User%3ASavannahRio2

http://plantsvszombies.wikia.com/wiki/User%3ANathania44

http://plantsvszombies.wikia.com/wiki/User%3ANathania1221

http://plantsvszombies.wikia.com/wiki/Thread:64304 (This
link is a discussion about the Nathania accounts, which was
interrupted by BobbyRio2, saying "don't block me")

They were blocked infinitely, but then the BobbyRio/SavannahRio
accounts sent me messages on several oth…